US2613766A - Brake rigging - Google Patents

Description

A. M. MIERS BRAKE RIGGING Oct. 14, 1952 3 Sheets-Sheet l Filed Nov. 24, 1948 A. M. MIERS BRAKE RIGGING oct. 14, 1952 3 Sheets-Sheet 2 Filed Nov. 24, -1948 Oct. 14, 1952 A, M, MlERS 2,613,766

BRAKE RIGGING 3 Sheets-Sheet 3 Filed Nov. 24, 1948 IN VEN TOR.

Patented Oct. 14, 1952 BRAKE RIGGING Archie Miers, Croton-on-Hudson, N. Y., as-

signor to Chrysler Corporation, Highland Park, Mich., a corporation of Delaware Application November 24, 1948, Serial No. 61,805

(Cl. 18S-205) fv 11 Claims.

This invention relates to railway car trucks and has particular reference to a simplied and improved means for mounting the brake rigging on the truck unit in such a manner that wear of the rigging components is materially reduced. This reduction in .wear of the rigging components is accomplished by resiliently suspending the rigging from the truck frame members such that thev` road shock applied to the frame members is effectively absorbed by the suspension without being transmitted to the rigging. While the resilient brake rigging suspension absorbs the road shock, during normal running with the brakes released, still, the arrangement is such that positive, unyielding supports are provided for the brake beams during application of the brakes and therefore the resilient suspension means is not required to take the brake reaction` and thus improved braking results.

Railroad maintenance records show conclu sively that one of the most frequent causes of lay-up of railway cars for repairs is"wear and damage in the brake rigging. The fact that the brake beam hanger links are often fixedly supported on unsprung frame members has been found to be one of the primary causes for the maintenance difficulties associated with the brake rigging.

It is a primaryl object of this invention to mount the brake rigging on the truck frame members in such a manner that under normal running condition with the brakes released the brake beam hangers are suspended from resilient means which effectively absorb the road shock transmitted through the frame members to the rigging, the suspension arrangement being such that on application of the brakes the brake beam hangers are automatically anchored to unsprung frame members which provide unyielding, positive, supports to take the brake reaction.

It is an additional object of this invention to provide a brake beam suspension that is simple, durable, e'icient, and economical to manufacture, install and maintain,

The nature of this invention as Well as additional objects and advantages thereof will b ecome fully apparent from a reading of the following de-` scription and auconsideration of the related drawings wherein:

Fig. 1 is a half plan view of a railway truck embodying this invention;

Fig. 2 is a side elevation of the railway truck shown in Fig. l with portions of the truck frame broken away to clearly disclose the invention;

Fig. 3 is a vertical sectional view taken along the lines 3-3 of Fig. 1;

Fig. 4 is a sectional elevation taken along the lines 4-4 of Fig. 1; f

beam hanger suspension shown in Figs. l to 4; and

Fig. 6 is an enlarged sectional elevation similar to Fig. 5 embodying a modied form of the invention.

The'railway car truck i9 comprises longitudinally extending, transversely` spaced, side frame members I6 mounted on a pair of longitudinally spaced, transversely extending, axles |I. Each axle I I carries a pair of wheels I2 which engage the conventional track rails I3.' The protruding ends of each axle |I `are journaled in wheel axle bearing assemblies I4 one of which is clearly shown in Fig. 2 and is subsequently described in detail. The bearing assemblies I4 are mounted in the inverted U-shaped journal openings I5 (see Fig. 2) in the ends of the side frame mem-bers I6. The mounting of the bearing assemblies I4 in the side frame journal openings I5 is such as to provide an unsprung, "pedestalless type of connection wherein the axles and bearing assemblies are solidly connected tothe side frame members and precluded from vertical movement with respect to the side frame members. Any typer of solid bearing connection may be used between the wheel axles and the side frames without aiecting the functioning of the brake beam suspension. The

wheel axle bearing assembly herein disclosed is similar to that shown in the U. S. patent to Janeway andMiers, No. 2,335,120.

Each of ther side frames I6 has a depressed middle sectionr Ita, provided with longitudinallyA spaced seats I'I on which are mounted nested coil springs I8 through which the' truck load is resiliently applied to the side frame members. The springs I8 in turn support the endk portions of the longitudinally extending beam members I9 which also form a part of the load supporting system. Beams |9 include the spring seats 20 to receive the upper ends of the coil springs I8. Beams I9 are arranged so` as to support another load carrying structure, namely, the transom frame 2|. This transom frame 2| comprises longitudinally spaced members 21 extending transversely of the truck, which members are joined at their ends by connecting sections 28 which overlie the central portions of the beams I9. The connecting sections 28 are formed `with spring y,receiving seats 29 which are vertically aligned with the complementary seats 32 on the beams I9.' These aligned spring seats have mounted therebe` tween the nested coil springs 33. The springs 33 transmit the load of the transom frame 2| to the beams I9 and at the same time cushion the supported truck load against impacts or shocks transmitted from the wheels to the beams I9.

Transom frame 2| pivotally supports the truck lbolster member 42 by vmeans of swing hanger assemblies 43 which assemblies permit limited transverse swinging movement of the truck ,bolster relative to the transom frame.l Swing hanger assemblies 43' are pivotally connected to the transom frame 2| by the swing hanger pins 44. Hanger assemblies 43 support the plank member 45 which rockably supports the bolster 42 at its center portion, Adjacent each outer end of plank 45 there are mounted spring units 46 that resiliently limit the transverse rocking of the bolster 42 relative to the plank member 45.

Thrust links 48, having their inner ends secured to a bracket 49 carried by the bolster i2 and their outer ends anchored to brackets b carried by the transom frame 2 I, restrict longitudinal movev ment of the bolster relative to the transom frame. Universal joints connect the thrust links 4.8 to their supporting brackets 49 and 5G. Each link 48 includes a resilient draft member Eil which permits the links 43 to take up the longitudinal thrust between the bolster 42 and the transom frame 2 l. Shock absorber units 52 restrain relative transverse or lateral movement between the bolster and transom frame.

Relative movement members I6 and the beam-mernbers I 9 is controlled by the shock absorber units 53 mounted therebetween. Alongthe outboard side of each side frame I6 there ispositioned a longitudinally extending stabilizing member 54, having one of its ends pivotally connected to the bracket 'I2 carried by the transom frame 2l and its other end pivotally connected to a bracket 55 carried by they side frame I S to restrain relative longitudinal and transverse movement between the side frame members and the transom frame.

The central portion of the truck bolster 4:2 is

formed with 'a conventional bearing member 4T which receives a complementary bearing portion carried by the body unit to be mounted on the truck unit. The bearing connections between the body unit and the truck bolsters permit relative turning movement between the car body unit and the supporting truck units.

It is now thought to be obvious how the lo'a'd of the car body unit and its contents istransferred to the truck bolster 42 and then through the swing hanger assembliesll to the transom frame 2 I'. The transom frame 2i Arests upon the springs Q3 which are in turn supported on the beams I9. Beams I9 transmit the car load to the side frame members IS through the springs I8. The side frame members I6 are rigidly supported at each` end on the wheel axle bearing assemblies I4 which are mounted on the ends of the axles Il.

The manner of solidly mounting the side frames IB on the axle supported wheel bearing assemblies I4, isshown in Fig'. 2. Each side frame end portionis provided with a U-shaped journal opening I5 to receive a wheel axle bearing assembly I4.

Each journal opening I 5 is formed with a bearing` seat 6I in the curved bight portion of its U-shaped wall. The seat portion BI receives the rigid bearing assembly I4 carried by the wheel axle II. Tie members 62 extend across the open vmouth l of the U-shaped opening I5 to retain the bearing assembly I4 within the opening I5. Each journal bearing assembly I4 comprises an outer housing 64 within which are concentrically mounted an outer roller bearing race 85, a set of tapered roller bearings 66, and an inner roller bearing race 6l, the latter being securedto and rotatable with the wheel axle k-I I. Housing 6d is adapted to contain oil or some other liquid lubricant so that the rollers 66 of the bearing assembly are constantly supplied with lubrioant. n l

- The wheel brake mechanism is best illustrated between the side frame in Figs. l and 4 and comprises an air cylinder II 'I2 protruding from the transom frame connecting sections 23. Connected to one end of each air cylinder il is a longitudinally extending brake shoe slack adjusting mechanism i3. Extending from the opposite end of each air cylinder 'II is a piston actuated connecting rod I adapted to operate the brake linkage associated therewith. Pivotally connected to the exposed end of rod 14 is a horizontally disposed, transversely extending lever l5. Lever 'I5 is slidably supported adjacent its inner end by the bearing block 'i6 carried by the transom frame member 2I. The inwardly disposed end of lever I is pivotally connected at TI to the longitudinallyextending, vconnecting rod 18. Rod 'I8 is pivotally connected at 'i9 to the vertically disposed lever 82.v Lever 82 is pivotally connected intermediate itsvends, as at 83, to the inwardly disposed end'of the longitudinally extending, lever member 84.' Lever 83 is rigidly mounted on the resiliently supported, transends of the brake beam 38 so as to permit rela-v tive rotatable movement of the shoes in a vertical plane.

the spring-loaded bearing members I which tend to retain the shoes in fixed positions relative toy the beam 98. Bearing members IGI] prevent the shoes from dragging on the wheels when the brakes are released which eliminates wear and chatter. The lever 82 is' pivotally connected at 85 to an intermediate portion of the compensating and actuating link 85. The outer end of link 86 is connected by the pivoted'link 87 to the outer end of the brake beam supported lever Bil. The connections between the several levers'82 and 84 and links 85 and 81 permit relative pivotal movement between these members and constitute a parallelogram linkage to prevent rotation of brake beam 98 in their hanger supports. A plurality of pin holes are located along the length of link 855 to permit adjustment of thev brake linkage to compensate for wear of the rigging'components. The inner end of actuating link 86 is pivotally connected at 88 to a vertically disposed lever 39 that is pivotally connected at 9D to the spring supported transom frame 2-I. A horizontally disposed, longitudinally extending, lever-like ment bythe spring-loaded bearing members Si'.

similar to the bearing members 'lllil associated with the outer brake shoes 99. The transom frame 2I with the depending levers 89 and 94 and the brake beam lever SI constitute a parallelogram linkage to control movement of the inner brake shoe96. The actuating link 85 ties together the'parallelogram linkages'for the inner and outer However, the freedom of Vrotation of the shoes 99 relative to thebeam 98 is restrained by' brake shoes so as to bring about substantially simultaneous application of both the inner and outer brake shoes when the brakes are to be applied.

The brake rigging onall wheels of the truck is .identical and for that reason the rigging on only one'wheelhas been described. The brake suspension that has been described will beconsidered a front wheel suspension for purposesof discussion. To coordinate the rigging on the front and rear wheelsalong each side of the truck a horizontally disposed, transversely extending rear wheel brake lever |04, similar in design to lever associated with the front wheel brakes, is pivotally connected to anv adjustably mounted pivot pin |05 carriedvby the brake shoe slack adjusting mechanism 15. The inwardly disposed end portion of lever |04I is pivotally connected to the connecting rod 18 for the brake linkage associated with the rear wheel brakes. Lever |04 is slidably supported on ar bearing block |06 carried by the transom frame member, the block |08 being similar to the bearing block 16 for the lever 15 associated with the front wheel brakes. The intermediate portions of levers 15 and |04 are connected together by a longitudinally extending equalizing link |08 that coordinates the action of the front and rear wheel braking mechanisms.

It is thought .to be obvious how admission of air under pressure to cylinder 1|, so as to cause connecting rod 14 to move to the right towards the front wheels of the truck, will apply the wheel brakes to both the front and rear wheels of the truck.v Movement of rod 14 forwardly rocks lever 15 about pivot pin connectionf|09 and this pulls rod 18 rearwardly. Moving rod 18 rearwardly rocks lever 82 rearwardly about pivot pin 85 and this pulls brake shoe 99 into engagement with the outer side'of the front wheel. Any further rearward movement of rod 18 then rocks lever 82 about the anchored pivot pin 83 and this causes pivot pin 85 and actuating link 86 to move forwardly to swing brake shoe 96 into engagement with the inner side of the front wheel.r This series of movements takes lplace practically'instantaneously therefore 'both the inner and outer brake shoes, 96 and 99 respectively, are actuated at practically the same time. Due to the equalizing link |08, which connects the front and rear wheel brake linkages, the forward lmovement of lever 15 during application of the brakes vmoves the lever |04 of the rear wheel brake rigging forwardly and this actuates the rear wheel brake linkage in the same manner as described for the front wheel brakes consequently both the front and rear wheel brakes are actuated at the same time. The air supply for the air cylinders on each side of the truck is such that the brakes on each side of the truck are Voperated simultaneously. f

As a result of the rigid mounting of the side frame members |6 on the wheel axles it is obvious that road shock will be transmitted lfrom the wheels |2 to the side frame I6 and lthence to the supports for the brake rigging `suspended from the unsprung side frames |6. Accordingly, if the brake rigging is not resiliently supported from the side frames I6 in such a manner `as to insulate the rigging from the shocks applied to the side frames, when the brakes are released, then the road shocky transmitted to the rigging supports will cause accelerated wear of the bearings and associated elements in the :rigging which can result in alfrequent shearingoi of .the brake beam. hanger pins, that is 'the pins that pivotally support the beam hangers |8. The wear results ing from road shock ina rigidly supported brake rigging construction thereby materially reduces the'life of the side frame supported brake rigging and is a constant source .of possible trouble. Not only are the brakes rendered inoperative by such failures of the brake rigging components but in addition the brake beam rigging may drop down on the rails and derail the truck units and their supported cars with a consequent loss of life'and property.

To eliminate this possible. source of trouble in the brake rigging, the side frame supported brake beams 98 are provided with resilient suspensions that effectively absorb all shock impacts that might be transmitted to their rigging. The suspension arrangement is such that a rigid support is automatically provided for this brake rigging when the brakes are applied but at all other times this rigging is resiliently insulated from the supporting frame members. This resilient shock absorbing suspension, comprises (see Fig. 5) a cantilever type leaf lspring unit I2 rigidly mounted on the ends of the upper walls IBc of each of the side frames I6 by means `of U-bolts ||3. Spring units |I2 are positioned such that the free ends of the cantilever spring arms overlie the transversely extending end portions Ib of the side frames which in turn overlie the end portions of the outer brake beams 98. Fxedly mounted on the free end of each of the spring units |2 is a depending brake beam hanger support I4 that extends downwardly through a vertically extending opening |20 in the end portion |617 of the associated side frame. Each brake beam hanger support ||4 is formed with an upper, horizontally extending, washer-like, bearing portion I5, an intermediate, vertically extending, neck portion IIB, and a lower, U-shaped, yoke portion |1. Pivotally mounted in each U-shaped yoke portion ||1 by means of a hanger pin is a brake beam hanger IIB which has its lower end portion pivotally connected to an end portion of an outer brake beam 98.

The spring units ||2 areI of such a stiffness that they will deflect suiiiciently to cushion the road shock transmitted to the frames |6 yet holdthe brake beam hanger supports |4 in suspended positions such that the hanger support bearing portions |15 and the yoke portions ||1 are out of contact with the adjacent portions |Bc of the side frame members when the brakes are not being applied. rlhe length of the neck portions ||6 of the supports ||4 is such that sufficient jounce space is provided between the portions ||5 and ||1 to absorb all shocks applied to the side frame members without the portions ||5 and ||1 contacting the upper or lower sides of the top walls |6c of the side frame members. By this arrangement, under normal running conditions with the brake released, the brake beam hanger links ||4 are free of the side frame portions |6c and thus are not subjected to'wear resulting from road shock. When the brakes are applied the brake reaction between the truck wheels and the brake shoes is transmitted to the brake beam hanger supports ||4 and these supports are forced either upwardly or downwardly, depending on the direction of wheel rotation, until the yokes ||1 or the washer-like bearing portions ||5 bear against the upper walls |6c of the side frame members so as to provide a firm, rigid support for the brake rigging. Fig. 4 shows the relative position of the swing hanger bearing portions H5, the yoke portions ||1 and the top walls |60 of the side frame portions |6b whenk the brakes are applied during forward travel of the truck. The other figures of the drawings show the position of the swing hanger links when the brakes are released.

In the modified form of the invention shown in Fig. 6, a coil spring |4| is mounted 'on the top wall ISC of the lside frame end portion IBb above a vertically extending opening |42 piercing the end portion of side frame member I6. Threaded through opening |42 and through the center of coil spring |4| is the vertically extending bolt portion |43 of brake beam hanger support |44. Hanger support bolt portion |43 is suspended from coil spring |4| by means of a washer cap |45 and a nut |46 mounted on the upper threaded end of bolt portion |43. The hanger support |44 includes an integral, U-shaped, yoke portion |45 that is carried Vby the lower end of bolt portion |43. Yoke portion |45 is positioned beneath the top wall |60 of the side frame member withthe sides of yoke portion |45 arranged between the vertically extending flange portions |6e of the side frame member i6. Flange portions |66 have verticallyr extending slots if adapted to slidablyV receive a pivot pin |41 that pivotally connects the brake beam hanger |18 to the depending leg portions of the U-shaped hanger support yoke portion |45'. A Cotter pin |48 and washers |49 lock pin |41 in slots |6f. Pivot pin |41 cooperates with the slots 16j in the side frame anges |66 to provide suitable guideways for the movable, resiliently suspended, hanger support |44. Hanger support yoke portion |45 has a at upper bearing surface |50 adapted to seat against the lower side of the side frame top wall lEc when the hanger support |44 is moved upwardly by brake reaction during application of the brakes. Seating of the hanger pins |41 inthe lower ends of slots |Bf limits the downward movement of the hanger support |44 during application of the brakes.

During normal running with the brakes released the hanger supports |44 are resiliently suspended onthe springs |4| which absorb the road 'shock applied to the side frames and prevent its transmission to the brake beam hangers. When the brakes are applied the Fig. 6 arrangement `functions in the same manner as the construction shownin Fig. 5 for the hanger supports are moved against rigid frame anch-or members which resist the brake reaction resulting from application of the brakes. The Fig. 6 form of the invention, in addition to resiliently supporting the brake beam hangers, includes means that positively guides the movement of the resiliently mounted hanger supports. By providing thepin and slot guidev/ay construction shown in the Fig. 6 modification the' coil spring supports for the hanger members are not subjected to tilting or canting during brake applicationand this increases the life ofthe springs.

It will be noted that the brake rigging arrangements herein disclosed provide resiliently mounted Vsuspensions for the brake beams during normal running with the brakes released. However, when the brakes are appliedthe resilient suspension for the brake beams is automatically converted into a non-resilient, rigidly supported, brake rigging arrangement that provides a positive, improved braking action without unneces sarily stressing the resilient suspension. Thus not only has the life of the-brake rigging been 8 improved by this construction but in addition an improved braking action results.

Brake rigging supported entirelyon resilient suspensions soft enough to cushion road shock will not provide asufciently rigid support to take the brake reactionxduring application of the brakes and thus such an arrangement can not provide a braking' action comparable to that obtained with a solidly supported rigging. Brake rigging that is permanently mounted on solid supports is subject to roadshock and consequently unnecessary wear and a' short life. By the arrangements. herein disclosed the desirable features ofthe resiliently suspended and the rigidly supported brake rigging systems have been combined into a single brake rigging arrangement that'is free oftheV disadvantages of each of the aforementioned systems.

vI'claiin:

l.' Abrake beam suspension for a railway truck` frame member comprising a vertically extending coilspring mounted on the frame member, a vertically extending'opening piercing said frame member beneath the" opening through said coil spring, 'a brake beamhanger support suspended from the coil spring and slidably mounted in the frame opening for vertical movement relative thereto in either of two opposite'directions, said hanger link including .an enlarged portion disposed beneath the opening through the frame member adapted to engage the frameV member after predetermined' movement of said hanger support in either of`said opposite directions to limit the verticalv movement of said hanger support andr to provide means for anchoring said support against said frame member so as to provide a rigid reaction joint for braking action.

and a. brake beam hanger link pivotally connected to said hanger support.

2'. A brake beam suspension for a railway truck frame member comprising a vertically extending' coil spring mounted on the frame member, a vertically extending opening piercing said frame member beneath'the opening through said coil spring,a brakeI beam hanger support vsuspended from the coil spring and slid'ably mounted in the frame opening for vertical movement relative thereto in eitherof two opposite directions, said hanger link including'an enlarged portion disposed beneath' the opening through the frame member adapted to engage the frame member after 'predetermined movement of said hanger support in either of' said opposite directions to limit the vertical movement of said hanger support' and to provide' means for anchoring said support against said frame member so as to provide 'a'rigid reaction joint for braking action, a brake beam 'hanger link pivotally connected to said. hanger support, and vguide means between said .hanger'support and said frame member to restrictsaid hanger support to vertical movement;

3. In a brake bean; suspension for a railway car truck, a truck frame provided with a vertically extending opening therethrough, a hanger support movab'ly mounted in said opening including av vertically extending bolt portion having an end disposed above said-`frame opening and va downwardly opening; YlJ-shaped, yoke portion disposed beneath said frame opening, a horizontally extending projection carried by the end of said bolt portion spaced above said -frame opening, a resilient membersurrounding saidV bolt portion and disposed between the projection on said bolt portion and the frame member, vertically slot- 9` ted, depending, frame flanges adjacent the legs of said U-shaped yoke portion, a hanger member pivotally connected to the yoke portion of said hanger support by bolt means, said bolt means extending through the hanger member, through the slots of said frame iianges and through said yoke portion, said bolt means thereby connecting the suspension to the frame member and providing guide means for the movement of said hanger member, said slotted flanges also providing seats to limit the movement of and to lrigidly support said hanger member when the brakes are applied.

4. In a brake beam suspension for a railwar car truck, a, truck frame provided with a vertically extending opening therethrough, a hanger support movably mounted in said opening including a vertically extending bolt portion having an end disposed above said frame opening and a downwardly opening, U-shaped, yoke portion disposed beneath said frame opening, a horizontally extending projection carried by the end of said bolt portion spaced above said frame opening, a resilient member surrounding said bolt portion and disposed between the projection on said bolt portion and the frame member, vertically slotted frame flanges depending from said frame adjacent the legs of said U-shaped yoke portion, a hanger member pivotally connected to the yoke portion of said hanger support by boltl means,

said bolt means extending through the hanger member, through the slots of said frame flanges and through said yoke portion, said bolt means thereby connecting the suspension to the frame member and providing guide means for the movement of said hanger member, and a bearing portion carried by said yoke portion adapted to engage said frame member after a predetermined vertical movement of said hanger support to rigidly support the hanger member on the frame member when the brakes are applied.

5. A brake beam suspension adapted to be mounted on a frame member comprising a hanger support provided with a bolt portion and a depending yoke portion, a coil spring surrounding said bolt portion adapted to extend between the frame member and the bolt portion to resiliently mount the hanger support on the frame member for movement relative thereto in each of two opposite directions, a hanger link pivotally connected tothe hanger support yoke portion bolt means mounted on said yoke portion adapted to be slidably connected to the frame member to mount the suspension on'the frame member, to limit the relative vertical movement of said hanger support and to provide guide means for the movement of the resiliently supported hanger link.

6. A brake beam suspension adapted to be mounted on a frame member comprising a hanger support provided with a bolt portion and a pivot portion, means carried by said bolt portion adapted to resiliently support said hanger support on the frame member for relative movement with respect thereto, a hanger link pivotally connected to said pivot portion, and a seat f portion and a pin portion carried by said hanger Asupport adapted to be engaged with portions of the frame after a predetermined deformation of the resilient supporting means, to limit the relative movement between said hanger support and said frame and to rigidly support said hanger support on the frame.

7. A brake beam suspension adapted to be mounted on a frame member comprising a hanger support provided with a bolt portion and a pivot portion, means carried by said bolt portion adapted to resiliently support said hanger support on the frame member for relative movement in each of two opposite directions, a hanger link 'pivotally connected to said pivot portion, a seat portion carried by said hanger support adapted to be engaged with the frame after a predetermined deformation of the resilient supporting means, said seat portion being adapted to rigidly support said hanger support von the frame after predetermined movement of the hanger support in either of said two directions, and guide means between said hanger support and the frame to restrict movement of the hanger support to said two opposite directions.

8. Ina brake beam suspension for a railway car truck comprising a truck frame member, a hanger support mounted in a vertically extending opening in said frame member for vertical movement relative theretoin each of two opposite directions, said hanger support including a yoke portion disposed beneath said frame member opening, means disposed between said framev member and said hanger support to resiliently mount said hanger support on said frame member, a pin pivotally connecting a hanger link to the yoke portion of said hanger support, vertically extending slots insaid frame member receiving portions of said pin to provide guide means for the movement of said hanger support, and means carried by said hanger support engageable with said frame member after a predetermined movement of said hanger support to provide a rigid mounting for said hanger support on said frame member after said predetermined movement of said support in either of said two opposite directions.

9. A shock absorbing suspension for a railway truck brake beam that is mounted on a truck frame member rigidly connected to the truck wheels comprising a resilient unit supported by said frame member, a brake beam hanger support mounted on the resilient unit for vertical movement relative to said frame member in either of two opposite directions, said hanger support including a pair of spaced apart anchor portions arranged so as to be free of the frame member when the brakes are released but adapted to be alternately moved into direct engagement with said frame member when the brakes are applied depending on the direction of Wheel rotation, said anchor portions being arranged to limit vertical movement of said hanger support in either of said opposite directions, and a brake beam hanger member pivotally connected to the hanger support.

10. In a railway truck, a truck frame member rigidly supported on the truck wheels, a brake beam suspension carried by said frame member comprising a beam hanger support, resilient means supporting said hanger support on said frame member for vertical movement relative thereto, means connecting said hanger support to said frame member providing guidev being adapted to have a portion thereof connected to a brake beam.

11, A brake beam suspension adapted to be mounted on a Wheeled vehicle frame member comprising a brake beam hanger support, resilient means arranged to mount said hanger support on the frame member for vertical movement relative thereto in each of tWo opposite directions, anchor means carried by said supportydrectly engageable with said frame member after a predetermined movement of said hanger support in either of said tWo opposite directions, guide means extending betweensad frame member and said hanger support to control and limit the movement ofthe resiliently mounted hanger support, and a beam hanger link carried by said support.

ARCI-IIE M. MIERS.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS

Images